WASET
Petcharat, K. , Areepong, Y. , Sukparungsri, S. , Mititelu, G.. "Numerical Approximation to the Performance of CUSUM Charts for EMA (1) Process". World Academy of Science, Engineering and Technology, Open Science Index 72, International Journal of Mathematical and Computational Sciences, (2012), 6(12), 1770 - 1774.